Process of purifying juices containing inuline and laevulose



UNITED STATES PATENT OFFICE.

ARNOLD DANIEL, F CHARLOTTENBURG, NEAR BERLIN, GERMANY, ASSLGNU-R, BY

MESNE ASSIGNMENTS, TO THE GHEMIGAL FOUNDATION, INC., A CORPORATION (7F DELAWARE.

PROCESS OF 'IPURIFYING JUICE-S CONTAINING INULINE AND 'LAEV'ULOSE.

1,399,544. No Drawing.

To all whom it may concern:

Be it 'known'that I, ARNOLD DANIEL, engineer and chemist, a subject of the King of Rumania, residing at Charlottenburg, near Berlin, in the German Empire, have in,-

, vented an improved and novel Process of Purifying Juices Containing lnuline and Lae'vulose, (for which I have filed applications in Germany, Sept. 18, 1916; in Austria, July 27, 1917; in Belgium, Aug. 9, 1917 in Hungary, Aug. 14, 1917; in Switzerland, Aug. 14, 1917; in Netherlands, Aug. 25,

1917 in Denmark, Aug. 25, 1917 in Great Britain, Sept. 18, 1917 and in Sweden, Jan. 23, 1918,) of which the following is a specification.

lit is known that to extract inuline and laevulose from plants the plant juices are first purified either b heating or by adding neutrally reacting c emical substances or acids. A- point to be paid attention to in one or the other of these treatments is either "to segregate from the juices, before the crystallization of the inuline, the deleterious non-inuline substances (for instance albumins, dye-stuffs, and other troubling substances) present within the juice, or to convert them into an innoxious form, in order 7 to facilitate the crystillization of the inuline,

as Well as to obtain it in pure state.

These processes do not allow of fully at taming the desired effect, and the subsequently extracted inuline must be repeatedly re-crystallized out of water. This re-crystallization renders the usual processes 'expensive and thus uneconomical.

T have discovered that the segregation of the non-inuline substances existing Within a the juices may be effected'expeditiously by Specificat'ion of fritters Patent.

tium, of barium, and of magnesium; finally basic lead acetate.

. Example: The juice squeezed or lixiviated out of the roots concerned (for instance dahlia roots) is heated for about 2,42; hours at "a comparatively high temperature (for instance about 80 (1.),- with an addition during the heating of carbonate of sodium in excess. The quantity of the alkaline bodies concerned and the. duration of the heating is to be determined according to the efiect that is to say, addition of carbonate Patented Dec. 8, 1921.. Application filed April 1c, 1918. Serial No. 22mm.

of sodium and continuation of heating is to P be carried on until, a filter test of the juice being made, another addition of said carbonateproduces no furtherreaction and, conse; quently, no precipitation takes place.

"Finally, the juice is filtered, perhaps after a preceding introduction of carbonic acid in order to remove deleterious substances such as, for example, compounds of barium calclum and strontlum; then the purified juice is evaporated to let the inuline crystalize out of said juice, and ultimately the crystals obtained are washed, as usually,

This process renders a re-crystallization of the inuline unnecessary. At the same time the possibility is given to obtain from pure inuline also pure laevulose and the other roducts of decomposition of the inuline or instance caramel and dextrin).

The non-inulinesubstances may be segregated also from solutions of raw inuline.

][ claim:

1. The process of obtaining inuline from juices which comprises heating the juice for about to 11} hours at a temperature of about 80 (3., adding an alkali belonging to the alkali metal group, during the heating and until an excess is shown, filtering and evaporating to crystallization.

2. The process of purifying juices contain ing inuline which comprises heating the juice for about 9; to 1% hours at a temperature of about 80 0, adding an alkali belonging to the alkali metal group to said juice during the heating in an amount such thatafter removing a portion of the liquid and filtering, there is no further precipitation upon further addition of alkali, filtering and evaporating to crystallization.

3. The process of purifying juices containing inuline which comprises heating the juice for about to 11} hours at a temate to said juice during the heating in an 10 perature of about 80 C. adding sodium caramount such that after removing a portion onate to said juice during the heating until of the liquid and filtering, there is no furan excess is shown, filtering and evaporatther precipitation upon further addition of 5 ing to crystallization. sodium. carbonate, filtering and evaporating 4. The process of purifying juices containto crystallization. 1 ing inuline Which comprises heating the In witness whereof I have hereunto set juice for about a to 1% hours at a temperamy hand. 'ture of about 80 C. adding sodium carbon- ARNOLD DANIEL. 

